Color triads

Just discovered a great exercise on WetCanvas! about painting with primary colors alone and what a palette were they able to create from them. So very inspired, I painted this quick sketch as my first try to find new color possibilities.
I love painting buildings, so I enjoyed these few minutes a lot...

I'm off to the telly now, as shortly our football team will be playing the second leg against Russia in the qualifications for the World Cup 2010. Cross the fingers!:)